Cardiac Surgery Certification Exam Cardiopulmonary Bypass Techniques 3

Question 1

Protamine is given after cardiopulmonary bypass primarily to:

Accepted Answer

Reverse heparin anticoagulation

Answer

Treat hypotension

Answer

Improve cardiac contractility

Answer

Prevent atrial fibrillation

Question 2

Which parameter best indicates adequate systemic oxygen delivery during cardiopulmonary bypass?

Accepted Answer

Mixed venous oxygen saturation (SvO2)

Answer

Systemic blood pressure alone

Answer

Heart rate

Answer

Central venous pressure

Question 3

What is the purpose of a left ventricular vent during cardiopulmonary bypass?

Accepted Answer

To prevent left ventricular distension and reduce myocardial work

Answer

To measure left ventricular pressure

Answer

To deliver cardioplegia to the left ventricle

Answer

To assist with deairing only

Question 4

Systemic inflammatory response syndrome (SIRS) after CPB is primarily triggered by:

Accepted Answer

Contact activation from blood exposure to the bypass circuit

Answer

Surgical incision alone

Answer

Anesthesia agents

Answer

Protamine administration only

Question 5

Glucose management during cardiopulmonary bypass is important because hyperglycemia:

Accepted Answer

Worsens neurological outcomes and increases infection risk

Answer

Causes hypotension

Answer

Decreases heparin effectiveness

Answer

Reduces cardiac contractility directly

Question 6

Which flow rate is considered the standard index flow for normothermic cardiopulmonary bypass in adults?

Accepted Answer

2.2–2.4 L/min/m²

Answer

1.0–1.2 L/min/m²

Answer

3.5–4.0 L/min/m²

Answer

0.5–0.8 L/min/m²